Pneumatic tube valve



Patented Feb. 10, i942 I UNITED STATES PATENT OFFICE l PNEUMATIC TUBE vALvE l Charles C. CreamerQSt. Paul, Minn. v Application January 24,1941, seria1Ne.375s4v 5 claims.. l(ci. zw-zm This invention relates to pneumatic tubes for vehicle tires, and its general object is to provide a novel valve-for a duplex inner tube, the tube consisting of inner and outer sections, one within the other and connected together in a manner to form separate non-communicating air chambers, and each section is inatedvor purposely deflated through a single valve stem, the latter having separate valve members therein, one for each chamber for individually controlling the same,` asv well as being carried by a single pin for simultaneously opening and closing the valve members, and so that the valve parts can be easily and expeditiously removed and applied with respect to the stem. a

From the foregoing, it will be seen that my tube not only eliminates the danger and resulting damage brought about by the puncture orl blow-out of single chambered tubes now in general use, but by the use of my valve, both sections of my tube. can be simultaneously inflated and deated, asrapidly as the single chambered tube, thus materially reducing the length of time now required in inating and vdeflating double'.

chambered tubes having direct communication between the chambers thereof.

A further object is to' provide a valve that is simple in construction, inexpensive to manufacthrough my tube and illustrates the valve in ele-Y Figure 2 is a longitudinal sectional view taken .through the valve.

Figure 3 is a view partly in modified form.

Referring to the drawing in' detail, it will be noted that my tube is shown withinarim mountsection of a slightly ed casing and inated .to better illustrate the 'l same, Aand the tube includesl an outer section I and an inner section 2, the latter acting in the nipple 6 having fixed therein and extending out wardly therefrom a hollow stem 1.

The inner end of the stem is flanged as -at 8 and registers with a duct 9 extending to the inner chamber 4, and the stem has a lateral port I0 therein registering with a duct II extending tov the outer chamber' 3. The outer end of the -duced in tapered formation'ad'jacent the threaded outer end to provide a seat I3.

Mounted in the stem is a sleeve that includes an outer cap section I4, an intermediate,short section I5 and a long inner end section I6, the

sections I5 an'd I6 each being formed with spaced annular ribs providing recesses for collar gaskets I1 and I8, the seat I2 having the gasket I8 mounted therein while the seat I3 receives the gasket I1, sov as to provide a leakproof connection between the sleeve and the stern, as will be apparent upon inspection of Figure 2.

The cap section is 4threaded Within the stem for holding the sleeve therein, as shown in Figure 2 and is not 'only swiveled on the intermediate section I5 but is mounted for limited slidable movement thereon, and has a cross member I9 formed on its outer end, with an opening therein for slidably receiving and guiding a pin 20 that extends centrally through the sleeve and 'has the usual head 2| formed on its outer end. The inner end of the intermediate section I5 is reduced to provide a seat 22 and the inner end of the inner section is tapered to provide a seat 23, Vthe seats 22 and 23 being for gasket carrying cup valve members 24' and 25 respectively, that are xed to the pin to be carried thereby and are normally held seated by a -coil spring capacity as .a partition within the outer section t and is formed therewith adjacent the inner pe- .riphery thereof, so that the sections provide an outer air chamber 3 and an inner air chamber 26 sleeved on the stem, with one end engagedwith the valve member `2B while its opposite end is engaged with a shoulder'formed within the inner section IB, as clearly shown in Figure v2.

The inner end section I6 is reduced between its ends for a portionv of its length, and that portion which is indicated vby the reference nu- 'meral 2l is spaced fromv the stem to provide a .chamber 28 communicating with the duct II,

vinto the duct 9 for inflating ythe inner section,

and of course these sections can be deated by holding the valve members 24 and 25 unseated through the medium of the stem 20. It will be further seen that the tube sections VI and! can A be simultaneously inflated and dented-natale idly as the single chamber-ed tube now inf-pensai use, due to the fact that there is no direct com.- munication between the chambers, and each chamber has direct communication with the sleeve, with the means of communication being individually controlled by the valve members that are operated simultaneously by the single stem.

In the form of Figures 1 and 2, it will be obvious that in the event the outer section should become punctured, the air cannot escape from the inner section, thus the casing will be supported by. the air Within the inner section, and thereby prevent an accident and in any event damage to the tube or casing, brought about by riding thereon when in a deflated condition.

While the inner section 2 of the form of Figures 1 and 2 remain inflated even though the outer section l is punctured, due to the fact that there 'is no communication between the chambers 3 and 4, in the form of Figure 3 it will be noted that the inner end section i6 of the sleeve has a minute opening 30 therein, so that in the event the outer section i in the latter form Abecomes punctured, the air will slowly leak from theV inner chamber 4 -to the puncture, through the medium of the sleeve, the chamber 28 and duct il. However, the escape of air will be very slow, and the inner section 2 will remain inflated for an ample time to allow the vehicle to come to a A:envases l openins, a sprixa` pressed pin alidahly mounted stop, thus avoiding an accident or damage to the' tube or casing. i

It is thought from the foregoing description It is to be understood that Achanges may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is:

1. A valve for a dual chamberedvehicle tire tube, comprising a hollow stem having an open inner end for communicating with one chamber and an opening between its ends for communieating with the other chamber, a sleeve within the stem and having leakproof connection therewith adjacent the ends of the sleeve, said sleeve provided with an intermediate perforated portion spaced from the inner wall of the stem and disposed for communication with saidfopening,y

inthe sleeve, and valveV membersnarriad by the pinand normally, engaaedvwithf ,natation individually controlling .thechalsharar- 3.`A'valve for afdual `cha'lnberod;vehicle` tire tube, comprising a hollowestem having an open inner end for -communicating with one chamber and an opening between its ends' for communieating with.the other chamber, a sleeve within the stem and having leakproof connection therewith adjacent the ends ot the sleeveysaid sleeve,

'including an outer cap section, an intermediate short section and a long inner end section, said cap section being swivelly and slidably mounted on the intermediate section and threadedin the stem for securing the sleeve therein, said intermediate and endf sections terminating at their inner-ends in seats, said end section provided with an intermediate perforated portion spaced from the inner wall of the stem and disposed in communication with said opening, a springl pressed pin slidably mounted in the sleeve and guided by the cap section, and valve members carried by the stem and normally engaged with the seats for individually controlling the chambers. l

4. A valve for a dual chambered vehicle tire tube, comprising a hollow stem having a reduced open inner end for communicatingwith one chamber and an opening between its ends for communicating with the other chamber, a sleeve within the stem and having leakproof connection therewith adjacent the ends of the sleeve, said sleeve including an outer cap section, an

intermediate short section and a long inner end section,vsaid cap section being swiveled and slidably mounted on the` intermediate section and threaded to thelstein for holding' the sleeve therein, said intermediate and inner end sections terminating intoy `seats and the end section surrounding the seat of the intermediate section,

' said end section provided with an intermediate a -spring pressed pin slidably mounted in the Y sleeve, and valve members carried by the pin perforated portion spaced from the inner wall ot the stem and disposed for communication with said opening,1a cross member included in the cap section, e stem siidamy mdunted within the cross member for movement within the sleeve,

cup valve members carried by'the stem and engageable with the seats for individually control 'l ling the chambers, and a,V spring sleeved on the stem for normally holding the valve members in closed position.

and an opening between its ends for communicating with the other chamber, a sleeve' .within the stem and having ieakproot connection thereand an opening between its ends'for comnnmi-v eating with the other chamber, a sleeve within the stem and having leakprooi connection izheref,

with adjacent the ends of the sleeve, said sleeve including a section having a'tapered end providing a seat, and a section connected to the ilrst section about' the seat, the second section having its end remote from the first section reduced to provide a seat, an intermediate perfo'-y rated portion included in thesecond section and spaced from the inner wall of the stem, said tionspacedfromtheinnerwallofthestemand for communication with said opening, a spring pressed pin alidabiy mounted In the sleeve. vvalvemelnbersc'arrledbythepinandlwrmally clomng the inner end of the sleeve and the latter between its ends for individually controlling the chambers, and said sleeve having an Openy communication between the sleeve and the open bersareinclosedposition. I

perforated portion communicating 'with said inner end of the valve stem when the valve memo. Canam, 

